Losing Power Causes Lost RAID Settings

Sep 29, 2018
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The past few times my desktop (Windows 10, Intel i7 4770K, ASUS ROG Hero VI motherboard) has lost power completely (unplugged from the wall), when I reboot, the BIOS has switched from RAID to AHCI and my RAID drives are completely lost. I've received no warnings on startup, but I have had to completely refresh Windows in order to correctly boot. I've been keeping my data backed up on an external drive so that I can restore it when I (inevitabl) lose power.

Any idea on how to fix this?